Unfortunately there is no web-browser for your TV - for whatever reason Sony has not made one available for your model TV (and other 2016 models) . I know this doesnt help you, but Sony has re-instated the browser on 2017 2K Smart TV models.
I have a KDL-32WD754 and I can't find the web browser app anywhere. It definitely did have one as we use the TV for an internal service status web page which is has been displaying uninterrupted for the past year or so (that is literally all the TV is used for). Had to power down the TV last week and since then I can't find the option to browse a web page anywhere.
